Derivative Instruments - Funds Withheld Provision (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total return swap value	$ 3,900	$ 2,900	$ 3,900	$ 2,900
Unrealized losses			14,400		$ 10,500
Unrealized gain/(loss) in value	(4,495)	$ 18,296	6,047	$ 28,511
Reinsurance recoverables (See Note 8)	39,899		39,899		20,190
American Republic Insurance Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reinsurance recoverables (See Note 8)	3,364		3,364		5,879
US Alliance Life and Security Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reinsurance recoverables (See Note 8)	49,974		49,974		52,378
Funds With held Provision Agreement
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Book value of assets	999,596		999,596		782,573
Market value of assets	985,172		985,172		772,109
Total return swap value			14,424		10,464
Unrealized loss on embedded derivatives			14,400		10,500
Funds With held Provision Agreement | American Republic Insurance Company
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Book value of assets	170,992		170,992		150,413
Market value of assets	163,894		163,894		143,952
Total return swap value			7,098		6,461
Funds With held Provision Agreement | Crestline SP 1
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Book value of assets	447,113		447,113		354,806
Market value of assets	446,708		446,708		356,374
Total return swap value			405		(1,568)
Funds With held Provision Agreement | Ironbound Reinsurance Company Limited
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Book value of assets	164,611		164,611		159,644
Market value of assets	159,116		159,116		154,477
Total return swap value			5,495		5,167
Funds With held Provision Agreement | Ascendent Re
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Book value of assets	64,479		64,479		56,064
Market value of assets	62,626		62,626		54,790
Total return swap value			1,853		1,274
Funds With held Provision Agreement | SRC1
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Book value of assets	152,401		152,401		61,646
Market value of assets	$ 152,828		152,828		62,516
Total return swap value			$ (427)		$ (870)